Couching-press for paper-machines.



0.3EYBOLD.

COUCHING PRESS FOR PAPER MACHINES.

APPLlCATlON FILED DEC- 6.1915.

Patented Nov. 21, 1916.

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CHRISTIAN SEiiBOLD, or DUREN, GERMANY.

COUCHING-PRESS FOR PAPER-MACHIN ES.

Specification of Letters Patent.

Patented Nov. 21, 1916.

Application filed December 6,1915. Serial No. 65,343.

To all whom it may concern:

Be it known that I, CHRISTIAN SEiBoLD, a subject of the German Emperor,residing at Diiren, Germany, have invented new and useful Improvementsin Coaching-Presses for Paper-Machines, of which the following is aspecification.

The present invention relates to couching presses for paper-machines ofthat kind, where the top or the bottom-cylinder of the couching press isprovided with a perforated jacket, through which the water squeezed outof the breadth of paper contained between the couching cylinders getsinto the interior of the perforated drum and is laterally led off fromthere.

The characteristic feature of the invention consists therein that insidethis pressing cylinder, designed as a perforated drum, a shovel-wheel isrotatably journaled independently from it and turns with a differentspeed and, in case of need, also in an opposite direction. By thisindependently rotating shovel-wheel, intended for the discharge of thewater squeezed out by the press, different advantages are attained.WVith a reduced speed of the machine-sieve, conse quently also of theperforated drum, the shovel-wheel may be brought to rotate within thelatter with an increased speed, for the purpose of obtaining thequickest possible discharge of the accumulated water of the press. Withan increased speed of the machine-sieve, on the contrary, as it isusual, especially with the more modern machines for the manufacture ofprinting paper, the press-water, accumulated on the inside periphery, isliable to adhere there in consequence of the centrifugal force. In suchcase it is convenient to give the shovel-wheel inside the quicklyrotating drum a slow rotation in the opposite direction, whereby thepress-water is, so to say, lifted from the inside of the drum and ledoff without being permitted to adhere for a long time.

The new couchingpress is shown, by way of example, in Figures 1 and 2 ofthe accompanying drawing, wherein similar letters refer to similar partsthroughout the several views, Fig. 1 being a longitudinal section andFig. 2 a transverse section.

The top couching-cylinder a is constructed with a perforated jacket andprovided with a felt-jacket b. The machine-sieve 0 runs' in known mannerin the first place around the bottom part of the top couching-cylinder aand embraces then the bottom cylinder of the couching-press. Inside theperforated couching-cylinder a. the shovel-wheel (Z is rotatablyjournaled and guided with its shaft 6 through corresponding stuflingboxes f. The shaft 6 of the shovel-wheel carries at either of its ends,outside the hollow cou'ching-cylinder, a step pulley, by means of whichthe shovel-wheel may be brought to turn with a corresponding speed inthe same or an opposite direction.

When the machine-sieve and the couchingpress are running, the waterdischarged from the paper enters through the perforated jacket into thetop couching-cylinder. The water entered into the couching-cylinder isled off through the separately rotating shovel-wheel, in consequence ofthe shape of the shovels, toward either side, in Fig. 1 to the leftside, through the ports located in the front of the couching-cylinder.Owing to the curvature of the shovels shown in Fig. 2 the shovel-wheelrotates in the same direction as the couching-roller with a greater orsmaller speed than the latter, so that the water squeezed out is at oncelifted from the shovels and led out of the couchingcylinder, as soon asit begins to accumulate in the bottom part of the couching-roller. Withgreater speeds of revolution the shovelwheel may also be caused to turn,as already mentioned, in an opposite direction, in which case theshovels must, of course, be curved in the opposite direction. In suchcase the water adhering to the inside periphery of the coaching-cylinderis caught by the shovels running in opposite direction and led off tothe side. Instead of the top couching-cylinder also the bottomcouching-cylinder, or even both cylinders of the couching-press maybeprovided with a perforated jacket and an inner shovel-wheel, turningindependently from the drum. F urthermore the lateral discharge of thewater squeezed out of the drum might be quickened by means of the actionof a sucking pump and the like.

What I claim as my invention and desire to secure by Letters Patent is Acouching-press for paper-machines, thereby characterized, that withinthe pressing roller a, constructed as a perforated drum, independentlyfrom it a, shovel-Wheel name to this specification in the presence of clis rotatably journaled, the same being tWo subscribing Witnesses.adapted to rotate With a different speed of revolution from that of theperforated drum, CHRISTIAN SEYBOLD' i substantially as set forth and forthe pur- Witnesses:

pose specified. J. D. ZI'EsEoKE,

In testimony whereof I have signed my 7 G. OBERGETHMANN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

